Device for dressing bevels on grinding wheels



p v 1959 w. MUENCH 2,902,024

DEVICE DRESSING BEVELS ON GRINDING WHEELS Filed Jan. 17, 1956 3 Sheets-Sheet 1 V w GI mm m r 1.? L Lm M w 2 5 2 Q m 2 2 em & W W

W. MUENCH Se t. 1, 1,959

DEVICE FOR DRESSING BEVELS ON GRINDING WHEELS 5 Sheets-Sheet 2 Filed Jan. 17, 1956 I N VEN TOR WALTER MUE/VGH ATTORNEYS Sept-1, 1959 w. MUENCH 2,902,024

-- DEVICE FOR DRESSING BEVELS 0N GRINDING WHEELS Filed Jan. 17, 1956 Y 3 Sheets-Sheet 5 1N VENTOR WALTER MUE/VCl-l ATTORNEYS United States Patent DEVICE FOR DRESSING BEVELS 0N GRINDING WHEELS Walter Muench, Newark, N.J., assignor to Walter Muench, Incorporated, Newark, N.J., a corporation of New Jersey 7 Application January 11, 1956, Serial No. 559,563 1 Claim. 01. 125-11 This invention relates generally to dressing devices for grinding wheels and it relates more particularly to an exceptionally simple and inexpensive device for dressing a bevel at one side of a grinding wheel, a bevel at the other side of the wheel, or bevels which converge from both sides to the wheel periphery.

A stationary support is provided, a swingable support is pivotally mounted on said stationary support, provision is made for holding said swingable support in any position to which it may be swung, and a slide is mounted on said swingable support for movement on a path transverse to the pivotal axis of said swingable support, said slidehaving means for mounting a diamondpoint or other dressing tool thereon. The swingable support may thus be swung to and secured in any required position to insure travel of'the slide unidirectionally with the required bevel, and said slide may then be slid by hand to feed the dressing tool across the bevel.

The invention aims to provide a novel device embodying the above characteristics in a simple and practical construction which may be easily and inexpensively manufactured and conveniently used for precision dressing.

In carrying out the above end, a further object is to provide simple yet adequate means for holding the swingable support in any position to which it may be swung.

Another object is to provide a saddle upon which the slide is mounted, said saddle being detachably mounted on the swingable support, permitting the use of this support to directly carry a dressing tool when said saddle and the slide are bodily removed and thereby making it possible to dress a concave or a convex radius on a grinding wheel.

Yet another object is to provide the saddle with a downwardly projecting positioning stud received in a bore in the swingable frame, said bore being adapted to receive a radius dressing tool when the saddle and slide are removed.

With the above and other objects in view that will hereinafter appear, the nature of the invention will be more clearly understood by reference to the following detailed description, the appended claim and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 of the accompanying drawings is a front elevation of the invention, the swingable support being shown in an idle zero position for illustrative purposes.

Figure 2 is a top plan view of Figure 1.

Figure 3 is a vertical transverse section on line 33 of Figure 1, the swingable support and parts mounted thereon being swung to an operative position for dressing a bevel on a grinding wheel.

Figures 4 and 5 are fragmentary views showing other wheel bevels which may be dressed.

Figure 6 is a fragmentary vertical longitudinal sectional view on line 66 of Figure 2.

Preferences have been disclosed in the drawings and will be rather specifically described but attention is inice vited to the possibility of making variations within the scope of the invention.

A horizontal base plate 1 is provided to rest upon a fixed support 2 under the grinding wheel 3 to be dressed, the front edge of said base plate 1 being provided with an upstanding flange 4. A rigid stationary support in the form of a U-shaped frame 5 rests on the base plate 1 and abuts the flange 4, said frame 5 being secured to said flange 4 by means of cap screws 6 and dowels 7. The upper ends 8 of the upstanding arms 9 of the frame 5 constitute bearings. These bearings 8 have aligned trunnion-receiving bores 10 and are transversely split at 11 between the ends of said bores 10. Also, at one side of the splits 11, the bearings 8 are longitudinally split at 12, providing said bearings with contractable inner ends 13. Clamping screws 14 are provided for contracting the bearing ends 13 to trunnion-clamping condition.

The U-shaped swing frame 15 is disposed within the confines of the rigid U-shaped frame 5, the ends of said swing frame 15 being provided with aligned trunions 16, said trunnions being secured against movement with respect to the frame 15, by means of tapered pins 17. The trunnions 16 are received in the bores 10 of the bearings 8 and said trunions have thrust collars 18 abutting the outer ends of said hearings to prevent endwise movement of the frame 15. When the above described clamping screws 14 are loosened, the swing frame 15 may be swung to any required position and said frame 15 may be held in said position by tightening said clamping screws 14.

A slide-mounting saddle plate 19 rests on the horizontal portion 20 of the swing frame 15 and is secured thereto by cap screws 21, said saddle plate 19 having longitudinal flanges 22 which straddle said frame portion 20. The saddle plate 19 is also provided with a downwardly projecting positioning stud 23 which is received in a vertical bore 24 centrally located in the aforesaid frame portion 20.

Two parallel blocks 25 are secured upon the plate 19 by means of screws 26, said blocks 25 being spaced apart longitudinally of the swing frame 15 and disposed transversely thereof. Two top plates 27 are secured upon the blocks 25 by screws 28 and project inwardly therefrom, and dowel pins 29 extend through said plates 27 and blocks 25 into the saddle plate 19.

The portion of the saddle plate 19 between the blocks 25, these blocks 25 and the inwardly projecting portions of the top plates 27 cooperate in forming a guideway in which an elongated slide plate 30 is mounted for movement transversely of the common axis of the trunnions 16, the ends of said slide plate 30 being provided with stop plates 31 secured thereto by screws 32, to limit the movements of said slide plate. An operating knob 33 is attachable to either end of the plate 30, said knob having a threaded stud 34 receivable in either of the threaded sockets 35 of said plate.

An elongated block 36 is secured upon the slide plate 30 by means of screws 37 and dowel pins 38, said block 36 extending longitudinally of said slide plate and having three longitudinally spaced, upwardly open sockets 39. A shank 40 carrying a Wheel-dressing diamond 41, is receivable in any one of the sockets 39. The block 36 has set screws 42 at its ends, and other set screws 43 at one side for tightly securing the shank 40. Only one of the screws 43 is shown in Figure 2 but there is preferably one of these screws for each socket 39, or the one screw may be moved from one screw hole to another if desired, depending upon which socket 39 is to be occupied by the shank 40. The longitudinal edge of the diamond 41 must always extend parallel with the sides of the grinding wheel 3. To assure this, the shank 40 has a flat 44 (Figure 1) for contact with one or the other of the set screws 42 when said shank is in either of the endmost of the sockets 39, and another flat 45 (Figures 1 and 3) for contact with the set screw 43 of the. intermediate socket 39 when the shank is positioned in e latter. Both set screws 42, 43 associated with either of the endmost sockets 39 maybe tightened against the flats 44 and 45, respectively when the shank 40 is positioned in either of these endmost sockets. The particular socket in which the shank 40 is to be placed depends upon the position at which the diamond 41 may be most advantageously used in performing a wheel dressing operation.

While setting the swing frame 15 at. the required angle (see Figure 3, for example) it is desirable to hold the slide plate 30 and block 36. against idle sliding. For this purpose, screws 46 have been shown. .After the frame 15 has been set, however, and held by tightening of the clamping screws 14, the screws 46 are released and the slide 30, 36 may then be moved by hand, using the knob 33, to feed the diamond 41 across the edge of the wheel 3 to effect the desired angle dressing. A protractor or other suitable instrument may be used in setting the swing frame 15 in such position that the travel of the diamond 41 will be parallel with the bevel to be dressed on the edge of the grinding wheel 3.

By relating the elements as shown in Figure 3, a bevel 47, at one side of a grinding wheel, may be dressed. To dress a bevel 48 (Figure 4) at the other side of the wheel, the entire mechanism is turned end for end and the knob 33 transferred to the other end of the slide. It will thus be seen that two bevels 49, 50 (Figure 5) converging to a corner, may alsobe successively dressed.

The saddle plate 19 and all parts mounted thereon may be removed from the swing frame by simply removing the two screws 21. Then, a diamond-carrying 4 shank such as 40 may be secured in the bore 24 for truing up a guiding wheel or cutting a concave or convex radius thereon. An opening 51 dotted in Figure 1, is provided, to receive a set screw for securing the diamond carrying shank in the bore 24.

From the foregoing it will be seen that a novel and advantageous construction has been provided for attaining the desired ends. However, attention is again invited to the possibility of making variations within the scope of th invention- 1 claim:

In a device for dressing a bevel on a grinding wheel, a stationary support, a swingable support pivotally mounted on said stationary support, means for rigidly securing said swingable support in any position to which it may be swung, and a slide mounted on said swingable support for movement on a path transverse to the pivotal axis of said swingable suppo t. said slide ha ng me s for m n a Wheel dressingqtqo here n, a suppor i base on which to support said stationary support and having .an upstand ng. ledgeyagai s which o g g e stationary support to hold it with the swing axis of the swingable support parallel the plane in which a wheel to be dressed is disp s d, sai s ion ry ppo having o ositely directed face bea ing p rallel r la i n ne to the other and being selectively placeable against the ledge, and said swing axis being disposed in a plane centered. between said parallel faces whereby the stationary support can be turned end for nd for seleo ively pl ing he pa llel fa es gainst said l dge,

References Cited in the file of this patent UNITED STATES PATENTS 384,795 Shoemaker June 19, 1888 481,380 Walker Aug. 23, 1892 1,596,701 Williams Aug. 17, 1926 

